CN203869805U - Waterproof device of atmospheric pressure measuring chip - Google Patents
Waterproof device of atmospheric pressure measuring chip Download PDFInfo
- Publication number
- CN203869805U CN203869805U CN201420219430.8U CN201420219430U CN203869805U CN 203869805 U CN203869805 U CN 203869805U CN 201420219430 U CN201420219430 U CN 201420219430U CN 203869805 U CN203869805 U CN 203869805U
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- millimeters
- water
- gallery
- volume
- measuring chip
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Abstract
The utility model relates to a waterproof device of an atmospheric pressure measuring chip. The waterproof device comprises a housing and a narrow and long channel. Operating space for accommodating the atmospheric pressure measuring chip is formed in the housing. The housing and a circuit board are sealed by a sealing ring. The operating space has first volume V1. The narrow and long channel is communicated with the operating space and has second volume V2. The specific value of the sum of the first volume and the second volume to the first volume is more than (1+ the underwater depth h (in meters) of the atmospheric pressure measuring chip)/10. In other words, (V1+V2)/V1 is more than (1+h (in meters)/10). The waterproof device may satisfy a requirement of IP67 waterproof grade.
Description
Technical field
The utility model relates to fields of measurement, relates in particular to the water-tight device of atmosphere measuring chip.
Background technology
In the time that atmosphere measuring chip is in running order, atmosphere measuring chip needs and ambient atmosphere communicates, and just can record current atmospheric numerical value.For the equipment that has the requirement of IP67 classification of waterproof, necessary guarantee equipment 1 meter of depths under water, leaves standstill 30 minutes, after taking-up, still can normally work.Atmosphere measuring chip of the prior art fails to reach the job requirement of this IP67 classification of waterproof.
Utility model content
For the above-mentioned defect existing in prior art, the utility model has designed a kind of water-tight device for atmosphere measuring chip that can meet the requirement of IP67 classification of waterproof.
According to the utility model on the one hand, a kind of water-tight device for atmosphere measuring chip is provided, has comprised: shell, has been formed for holding the work space of atmosphere measuring chip in shell, shell is by O-ring seal and circuit board sealing, and work space has the first volume V 1; Gallery, gallery communicates with work space, gallery has the second volume V 2, wherein, the ratio of the first volume and the second volume sum and the first volume is greater than (the residing degree of depth under water of 1+ atmosphere measuring chip h/10),, (V1+V2)/V1> (1+h (unit is rice)/10).
According to the another aspect of the utility model, the shape of cross section of gallery is following any: circle, ellipse, square, rectangle, rhombus, polygon.
According to the another aspect of the utility model, the area of the xsect of gallery is in the scope of 0-5 square millimeter.
According to the another aspect of the utility model, the xsect of gallery is diameter while being D2 circular, the height H 2 of gallery with the ratio of diameter D2 in the scope of 10:1 to 180:1.
According to the another aspect of the utility model, diameter D2 is in the scope of 0.5 to 1.5 millimeter, and height H 2 is in the scope of 15 millimeters to 90 millimeters.
According to the another aspect of the utility model, diameter D2 is 1.2 millimeters, and height H 2 is following arbitrary value: 15 millimeters, 30 millimeters, 45 millimeters, 60 millimeters, 70 millimeters, 80 millimeters, 90 millimeters.
According to the another aspect of the utility model, when the xsect of gallery is length of side L2 square, the height H 2 of gallery with the ratio of length of side L2 in the scope of 7:1 to 180:1.
According to the another aspect of the utility model, length of side L2 is in the scope of 0.5 to 2.1 millimeter, and height H 2 is in the scope of 15 millimeters to 90 millimeters.
According to the another aspect of the utility model, length of side L2 is 2 millimeters, and height H 2 is following arbitrary value: 15 millimeters, 30 millimeters, 45 millimeters, 60 millimeters, 70 millimeters, 80 millimeters, 90 millimeters.
According to the another aspect of the utility model, gallery is connected with shell by welding.
Should be appreciated that more than the utility model generality description and the following detailed description are all exemplary and explanat, and be intended to provide further explanation for the utility model as claimed in claim.
Brief description of the drawings
Comprise that accompanying drawing is for providing, the utility model further to be understood, they are included and form the application's a part, and accompanying drawing shows embodiment of the present utility model, and with together with this instructions, play the effect of explaining the utility model principle.In accompanying drawing:
Fig. 1 is according to the side sectional view of the water-tight device for atmosphere measuring chip of the present utility model.
Embodiment
With detailed reference to accompanying drawing, embodiment of the present utility model is described now.
Fig. 1 is according to the side sectional view of the water-tight device for atmosphere measuring chip of the present utility model.Water-tight device 100 for atmosphere measuring chip of the present utility model comprises shell 110 and gallery 120.In shell 110, be formed for holding the work space 112 of atmosphere measuring chip 200, shell 110 seals by O-ring seal 300 and circuit board 400, and work space 112 has the first volume V 1.Gallery 120, gallery 120 communicates with work space 112, and gallery 120 has the second volume V 2.The V1 ratio of the first volume V 1 and the second volume V 2 sums and the first volume is greater than (the residing degree of depth under water of 1+ atmosphere measuring chip h (unit is rice)/10),, (V1+V2)/V1> (1+h (unit is rice)/10).
In one embodiment, shell 110 is placed in a relatively independent work space 112 atmosphere measuring chip, and shell and circuit board is sealed with O-ring seal.The volume of work space 112 is as far as possible little.Gallery 120 communicates work space 112 and ambient atmosphere, to meet the condition of work of atmosphere measuring chip.
In one embodiment, the shape of cross section of gallery 120 is following any: circle, ellipse, square, rectangle, rhombus, polygon.
In one embodiment, the area of the xsect of gallery 120 is in the scope of 0-5 square millimeter.
In one embodiment, the xsect of gallery 120 is diameters while being D2 circular, the height H 2 of gallery 120 with the ratio of diameter D2 in the scope of 10:1 to 180:1.
In one embodiment, the diameter D2 of gallery 120 is in the scope of 0.5 to 1.5 millimeter, and height H 2 is in the scope of 15 millimeters to 90 millimeters.
In one embodiment, the diameter D2 of gallery 120 is 1.2 millimeters, and height H 2 is following arbitrary value: 15 millimeters, 30 millimeters, 45 millimeters, 60 millimeters, 70 millimeters, 80 millimeters, 90 millimeters.
In another embodiment, when the xsect of gallery 120 is length of side L2 square, the height H 2 of gallery 120 with the ratio of length of side L2 in the scope of 7:1 to 180:1.
In one embodiment, foursquare length of side L2 is in the scope of 0.5 to 1.05 millimeter, and height H 2 is in the scope of 15 millimeters to 90 millimeters.
In one embodiment, foursquare length of side L2 is 1 millimeter, and height H 2 is following arbitrary value: 15 millimeters, 30 millimeters, 45 millimeters, 60 millimeters, 70 millimeters, 80 millimeters, 90 millimeters.
In one embodiment, gallery 120 is connected with shell 110 by welding.
Why atmosphere measuring chip of the present utility model can reach the requirement of IP67 classification of waterproof, its principle of work is as follows: owing to being provided with gallery 120 in water-tight device, therefore when equipment of the present utility model is inserted under water, while carrying out the test of IP67 classification of waterproof, water flows into gallery 120 from the opening of gallery 120 tops very lentamente, until after 30 minutes, water is the whole gallery 120 of underfill still, also be, between the water pouring in and work space 112, still deposit certain distance, form the volume V x that air is filled, so water does not contact with work space 112.Thus, atmosphere measuring chip can not be subject to that water currents is short-circuited or other faults.After full in the time of 30 minutes of IP67 classification of waterproof test, equipment is taken out from water, after the water in gallery 120 is poured out, atmosphere measuring chip still can normally be worked.Owing to possessing the water-tight device for atmosphere measuring chip of the present utility model, therefore atmosphere measuring chip of the present utility model can reach the requirement of IP67 classification of waterproof.
the first embodiment
According to the first specific embodiment of the present utility model, work space 112 is right cylinder, and the diameter D1 of its circular cross section is 8 millimeters, and its height H 1 is 1.7 millimeters, and the volume V 1 that obtains thus work space 112 is 85.41 cubic millimeters.Gallery 120 is also right cylinder, and the diameter D2 of its circular cross section is 1.2 millimeters, and its height H 2 is 15 millimeters, and the volume V 2 that obtains thus gallery 120 is 16.96 cubic millimeters.
If equipment is placed in to 1 meter under water, to be positioned at degree of depth h be under water 1 meter to atmosphere measuring chip, therefore (1+h (unit is rice)/10)=1.1.While carrying out the test of IP67 classification of waterproof, the volume that forms air filling between the water pouring in and work space 112 is Vx.Atmospheric pressure: P0=10^5Pa.The pressure of 1 meter of depths calculates under water: P1=ρ gh+P0=(1.0 × 10^3kg/m^3) × 10N/kg × 1m+P0=1.1 × 10^5Pa.So: (V1+V2)/(V1+Vx)=P1/P0=1.1.
Due to (V1+V2)/V1=(85.41+16.96)/85.41 ≈ 1.2>1.1, therefore can obtain Vx>0, the volume that exists air to fill between the water that pours in and work space 112 has also just been described.Because water does not contact with work space 112, atmosphere measuring chip can not be subject to that water currents is short-circuited or other faults, therefore atmosphere measuring chip of the present utility model from water after IP67 classification of waterproof test is taken out, water, from gallery 120 is emptying, still can normally be worked.
the second embodiment
According to the second specific embodiment of the present utility model, work space 112 is right cylinder, and the diameter D1 of its circular cross section is 8 millimeters, and its height H 1 is 1.7 millimeters, and the volume V 1 that obtains thus work space 112 is 85.41 cubic millimeters.Gallery 120 for xsect be foursquare cylinder, the length of side L2 of its square cross section is 1 millimeter, its height H 2 is 15 millimeters, the volume V 2 that obtains thus gallery 120 is 15 cubic millimeters.
If equipment is placed in to 1 meter under water, to be positioned at degree of depth h be under water 1 meter to atmosphere measuring chip, therefore (1+h (unit is rice)/10)=1.1.While carrying out the test of IP67 classification of waterproof, the volume that forms air filling between the water pouring in and work space 112 is Vx.Atmospheric pressure: P0=10^5Pa.The pressure of 1 meter of depths calculates under water: P1=ρ gh+P0=(1.0 × 10^3kg/m^3) × 10N/kg × 1m+P0=1.1 × 10^5Pa.So: (V1+V2)/(V1+Vx)=P1/P0=1.1.
Due to (V1+V2)/V1=(85.41+15)/85.41 ≈ 1.18>1.1, therefore can obtain Vx>0, the volume that exists air to fill between the water that pours in and work space 112 has also just been described.Because water does not contact with work space 112, atmosphere measuring chip can not be subject to that water currents is short-circuited or other faults, therefore atmosphere measuring chip of the present utility model from water after IP67 classification of waterproof test is taken out, water, from gallery 120 is emptying, still can normally be worked.
Although more than disclosed two specific embodiments of the present utility model, but the ordinary skill people of this area can easily expect, as long as gallery 120 can be arranged to not only narrow but also long, in the time carrying out under water one meter of IP67 level estimate, do not make water fill whole gallery, and reserve the volume that the air between work space is filled.The xsect of gallery 120 can be also other shapes, for example, be ellipse, rectangle, rhombus, polygon or other shapes.Equally, the area of the xsect of gallery 120, in the scope of 0-1.5 square millimeter, but is also not limited to the value within the scope of this, does not make water fill whole gallery as long as can ensure in the time carrying out under water one meter of IP67 level estimate.
Equally, although work space 112 shown in specific embodiment of the utility model is cylindricality, but the shape of work space 112 is not limited to this, as long as can hold atmosphere measuring chip.
Water-tight device for atmosphere measuring chip of the present utility model, it ensures that water cannot enter work space in the environment of IP67 classification of waterproof test, ensures the normal work of equipment.
Those skilled in the art can be obvious, can carry out various modifications and variations and not depart from spirit and scope of the present utility model above-mentioned exemplary embodiment of the present utility model.Therefore, be intended to make the utility model to cover to drop within the scope of appended claims and equivalence techniques scheme thereof to amendment of the present utility model and modification.
Claims (10)
1. for a water-tight device for atmosphere measuring chip, comprising:
Shell, is formed for holding the work space of described atmosphere measuring chip in described shell, described shell is by O-ring seal and circuit board sealing, and described work space has the first volume V 1;
Gallery, described gallery communicates with described work space, and described gallery has the second volume V 2,
Wherein, the ratio of described the first volume and described the second volume sum and described the first volume is greater than (the residing degree of depth under water of atmosphere measuring chip h described in 1+ (unit is rice)/10),, (V1+V2)/V1> (1+h (unit is rice)/10).
2. water-tight device as claimed in claim 1, is characterized in that, the shape of cross section of described gallery is following any: circle, ellipse, square, rectangle, rhombus, polygon.
3. water-tight device as claimed in claim 2, is characterized in that, the area of the xsect of described gallery is in the scope of 0-1.5 square millimeter.
4. water-tight device as claimed in claim 3, is characterized in that, the xsect of described gallery is diameter while being D2 circular, the height H 2 of described gallery with the ratio of described diameter D2 in the scope of 10:1 to 180:1.
5. water-tight device as claimed in claim 4, is characterized in that, described diameter D2 is in the scope of 0.5 to 1.5 millimeter, and described height H 2 is in the scope of 15 millimeters to 90 millimeters.
6. water-tight device as claimed in claim 5, is characterized in that, described diameter D2 is 1.2 millimeters, and described height H 2 is following arbitrary value: 15 millimeters, 30 millimeters, 45 millimeters, 60 millimeters, 70 millimeters, 80 millimeters, 90 millimeters.
7. water-tight device as claimed in claim 3, is characterized in that, when the xsect of described gallery is length of side L2 square, the height H 2 of described gallery with the ratio of described length of side L2 in the scope of 14:1 to 180:1.
8. water-tight device as claimed in claim 7, is characterized in that, described length of side L2 is in the scope of 0.5 to 1.05 millimeter, and described height H 2 is in the scope of 15 millimeters to 90 millimeters.
9. water-tight device as claimed in claim 8, is characterized in that, described length of side L2 is 1 millimeter, and described height H 2 is following arbitrary value: 15 millimeters, 30 millimeters, 45 millimeters, 60 millimeters, 70 millimeters, 80 millimeters, 90 millimeters.
10. the water-tight device as described in any one of claim 1-9, is characterized in that, described gallery is connected with described shell by welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420219430.8U CN203869805U (en) | 2014-04-29 | 2014-04-29 | Waterproof device of atmospheric pressure measuring chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420219430.8U CN203869805U (en) | 2014-04-29 | 2014-04-29 | Waterproof device of atmospheric pressure measuring chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203869805U true CN203869805U (en) | 2014-10-08 |
Family
ID=51650745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420219430.8U Withdrawn - After Issue CN203869805U (en) | 2014-04-29 | 2014-04-29 | Waterproof device of atmospheric pressure measuring chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203869805U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021344A (en) * | 2014-04-29 | 2015-11-04 | 梅特勒-托利多仪器（上海）有限公司 | Waterproof device of atmospheric pressure measuring chip |
| CN107144395A (en) * | 2017-07-06 | 2017-09-08 | 贵州航天电器股份有限公司 | A kind of air pressure measuring apparatus |
-
2014
- 2014-04-29 CN CN201420219430.8U patent/CN203869805U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021344A (en) * | 2014-04-29 | 2015-11-04 | 梅特勒-托利多仪器（上海）有限公司 | Waterproof device of atmospheric pressure measuring chip |
| CN105021344B (en) * | 2014-04-29 | 2019-10-25 | 梅特勒-托利多仪器（上海）有限公司 | Water-tight device for atmosphere measuring chip |
| CN107144395A (en) * | 2017-07-06 | 2017-09-08 | 贵州航天电器股份有限公司 | A kind of air pressure measuring apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141008 Effective date of abandoning: 20191025 |